Shelf unit



FIG. 1 is a front perspective view of a shelf unit showing our newdesign;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown in the drawings represent portions of the shelfunit that form no part of the claimed design. The dot-dashed lines inthe figures represent boundary lines defining a boundary of certainaspects of the claimed design.

CLAIM The ornamental design for a shelf unit, as shown and described.